:root{
  --bg:#0a0a0b;
  --panel:#131315;
  --line:rgba(255,255,255,.085);
  --line-strong:rgba(255,255,255,.16);
  --text:#ece7dd;
  --muted:#8b877f;
  --muted-dim:#615e58;
  --accent:#d6ff3f;
  --serif:"Iowan Old Style","Palatino Linotype",Palatino,Georgia,"Songti SC",serif;
  --sans:"Segoe UI","Microsoft YaHei UI",system-ui,-apple-system,sans-serif;
  --mono:"Cascadia Mono",Consolas,"SFMono-Regular",monospace;
  --radius:14px;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:15px;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
.bg-glow{
  position:fixed;inset:0;pointer-events:none;z-index:0;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(214,255,63,.06), transparent 60%),
    radial-gradient(700px 400px at 100% 0%, rgba(120,120,255,.05), transparent 60%);
}
.hidden{display:none !important}
.mono{font-family:var(--mono);font-size:11px;letter-spacing:.06em}

/* ---------- top bar ---------- */
.topbar{
  position:sticky;top:0;z-index:40;
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:18px 40px;
  background:rgba(10,10,11,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:baseline;gap:10px}
.brand-dot{
  width:7px;height:7px;border-radius:50%;background:var(--accent);
  box-shadow:0 0 12px rgba(214,255,63,.7);align-self:center;
}
.brand-name{font-family:var(--serif);font-size:19px;letter-spacing:.02em}
.brand-sub{font-family:var(--mono);font-size:10px;color:var(--muted-dim);letter-spacing:.22em}
.top-actions{display:flex;align-items:center;gap:10px}
.archive{
  appearance:none;background:transparent;color:var(--muted);
  border:1px solid var(--line);border-radius:999px;
  padding:7px 14px;font-family:var(--mono);font-size:11px;letter-spacing:.05em;
  cursor:pointer;transition:border-color .18s,color .18s;
}
.archive:hover{border-color:var(--line-strong);color:var(--text)}
.ghost-btn{
  display:inline-flex;align-items:center;gap:7px;justify-content:center;
  background:transparent;color:var(--text);
  border:1px solid var(--line);border-radius:999px;
  padding:7px 15px;font-family:var(--sans);font-size:12.5px;
  cursor:pointer;transition:background .18s,border-color .18s,transform .12s;
}
.ghost-btn:hover{background:rgba(255,255,255,.045);border-color:var(--line-strong)}
.ghost-btn:active{transform:translateY(1px)}
.ghost-btn:disabled{opacity:.4;cursor:not-allowed}
.solid-btn{
  display:inline-flex;align-items:center;gap:7px;justify-content:center;
  background:var(--accent);color:#0a0a0b;border:none;border-radius:999px;
  padding:9px 18px;font-size:13px;font-weight:600;cursor:pointer;
  transition:filter .18s,transform .12s;
}
.solid-btn:hover{filter:brightness(1.08)}
.solid-btn:active{transform:translateY(1px)}
.solid-btn:disabled{opacity:.35;cursor:not-allowed;filter:none}

/* ---------- layout ---------- */
main{position:relative;z-index:1;max-width:1240px;margin:0 auto;padding:36px 40px 40px}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 342px;gap:52px;align-items:start}
.col-main{min-width:0}
.meta-line{
  display:flex;align-items:center;gap:10px;color:var(--muted);
  padding-bottom:18px;margin-bottom:6px;border-bottom:1px solid var(--line);
}
.meta-sep{color:var(--muted-dim)}

/* ---------- track list ---------- */
.track-list{list-style:none;margin:0;padding:0}
.track{
  display:grid;
  grid-template-columns:34px 52px minmax(0,1fr) auto;
  gap:16px;align-items:center;
  padding:11px 10px 11px 0;
  border-bottom:1px solid rgba(255,255,255,.045);
  border-radius:8px;
  transition:background .16s;
  cursor:pointer;
}
.track:hover{background:rgba(255,255,255,.035)}
.track.selected{background:rgba(255,255,255,.055)}
.track.selected .t-title{color:var(--accent)}
.track .idx{
  font-family:var(--mono);font-size:11px;color:var(--muted-dim);
  text-align:center;letter-spacing:.04em;
}
.cover-wrap{position:relative;width:52px;height:52px;border-radius:6px;overflow:hidden;background:#1b1b1e}
.cover-wrap img{width:100%;height:100%;object-fit:cover;display:block}
.cover-fallback{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:19px;color:#0d0d0e;font-weight:600;
}
.t-main{min-width:0}
.t-title,.t-sub{min-width:0;max-width:100%}
.t-title{
  font-size:14.5px;font-weight:500;color:var(--text);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.t-sub{
  font-size:12px;color:var(--muted);margin-top:2px;
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.t-sub .dot{margin:0 6px;color:var(--muted-dim)}
.t-side{display:flex;align-items:center;gap:8px}
.row-actions{display:flex;gap:6px;opacity:0;transform:translateX(4px);transition:opacity .16s,transform .16s}
.track:hover .row-actions,.track.selected .row-actions{opacity:1;transform:none}
.icon-btn{
  width:28px;height:28px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:50%;border:1px solid var(--line);background:transparent;color:var(--muted);
  cursor:pointer;text-decoration:none;font-size:11px;font-family:var(--mono);
  transition:color .15s,border-color .15s,background .15s;
}
.icon-btn:hover{color:var(--text);border-color:var(--line-strong);background:rgba(255,255,255,.05)}
.icon-btn.disabled{opacity:.22;pointer-events:none}

/* ---------- side cards ---------- */
.col-side{display:flex;flex-direction:column;gap:16px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card-label{
  font-family:var(--mono);font-size:10px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--muted-dim);margin:0 0 14px;
}
.pick-cover{
  position:relative;width:100%;aspect-ratio:1;border-radius:10px;overflow:hidden;
  background:linear-gradient(135deg,#222,#0e0e10);margin-bottom:18px;
}
.pick-cover img{width:100%;height:100%;object-fit:cover;display:block}
.pick-initial{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:76px;color:rgba(255,255,255,.16);
}
.pick-artist{font-family:var(--serif);font-size:26px;line-height:1.2;margin:0 0 4px;letter-spacing:-.01em}
.pick-album{margin:0;color:var(--muted);font-size:13.5px}
.pick-context{margin:10px 0 0;color:var(--muted-dim);font-size:11.5px;font-family:var(--mono);letter-spacing:.03em}
.pick-actions{display:flex;align-items:center;gap:8px;margin-top:18px;flex-wrap:wrap}
.chip{
  font-size:12px;color:var(--muted);text-decoration:none;
  border:1px solid var(--line);border-radius:999px;padding:7px 13px;
  transition:color .15s,border-color .15s;
}
.chip:hover{color:var(--text);border-color:var(--line-strong)}
.chip.disabled{opacity:.3;pointer-events:none}
.source-link{
  display:block;margin-top:14px;font-size:11.5px;color:var(--muted-dim);
  text-decoration:none;border-top:1px solid var(--line);padding-top:12px;
}
.source-link:hover{color:var(--accent)}

.export-grid{display:flex;flex-direction:column;gap:8px}
.wide{width:100%}
.hint{margin:12px 0 0;font-size:11.5px;color:var(--muted-dim);line-height:1.5}
.hint.warn{color:#e8b06b}
.stats-line{
  margin:0 0 12px;font-family:var(--mono);font-size:11px;
  letter-spacing:.02em;color:var(--muted-dim);
}
.source-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.source-list li{display:flex;align-items:center;justify-content:space-between;font-size:12.5px;color:var(--muted)}
.source-list li.head{
  font-family:var(--sans);font-size:10.5px;letter-spacing:.05em;
  color:var(--muted-dim);padding:0 0 8px;margin-bottom:4px;
  border-bottom:1px solid var(--line);line-height:1.4;
}
.source-list li.head .n{color:var(--muted-dim);font-size:10px}
.source-list .n{font-family:var(--mono);font-size:11px;color:var(--text)}
.source-list a{color:var(--text);text-decoration:none}
.source-list a:hover{color:var(--accent)}

/* ---------- loading / error ---------- */
.loading{min-height:64vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;gap:6px}
.eyebrow{font-family:var(--mono);font-size:10px;letter-spacing:.28em;color:var(--muted-dim);margin:0}
.loading-title{font-family:var(--serif);font-size:clamp(26px,4vw,40px);font-weight:400;margin:10px 0 6px;letter-spacing:-.01em}
.loading-detail{color:var(--muted);font-size:13px;margin:0;min-height:20px;max-width:520px}
.load-bar{width:min(420px,80vw);height:2px;background:rgba(255,255,255,.09);border-radius:2px;margin:26px 0 12px;overflow:hidden}
#loadBar{height:100%;width:2%;background:var(--accent);transition:width .5s ease}
.loading-note{font-size:11.5px;color:var(--muted-dim);margin:0}
.error-state{min-height:60vh;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;text-align:center}
.error-state h2{font-family:var(--serif);font-weight:400;font-size:30px;margin:6px 0 0}

/* ---------- toast ---------- */
.toast{
  position:fixed;left:50%;bottom:36px;transform:translate(-50%,14px);
  background:#1c1c1f;color:var(--text);border:1px solid var(--line-strong);
  padding:9px 16px;border-radius:999px;font-size:12.5px;z-index:80;
  opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;
  box-shadow:0 12px 30px rgba(0,0,0,.45);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* ---------- 左右两列各自独立滚动（仅桌面） ---------- */
@media (min-width:1081px){
  html,body{height:100%;overflow:hidden}
  body{display:flex;flex-direction:column}
  .topbar{flex:0 0 auto}
  main{flex:1 1 auto;min-height:0;overflow:hidden;width:100%;padding-bottom:28px}
  .layout{height:100%;min-height:0;align-items:stretch}
  .col-main{
    height:100%;min-height:0;overflow-y:auto;overscroll-behavior:contain;
    padding-right:14px;scrollbar-width:thin;
    scrollbar-color:rgba(255,255,255,.16) transparent;
  }
  .col-side{
    height:100%;min-height:0;overflow-y:auto;overscroll-behavior:contain;
    padding-right:6px;scrollbar-width:thin;
    scrollbar-color:rgba(255,255,255,.16) transparent;
  }
  .col-main::-webkit-scrollbar,.col-side::-webkit-scrollbar{width:6px}
  .col-main::-webkit-scrollbar-thumb,.col-side::-webkit-scrollbar-thumb{
    background:rgba(255,255,255,.16);border-radius:3px;
  }
  .col-main::-webkit-scrollbar-track,.col-side::-webkit-scrollbar-track{background:transparent}
}

/* ---------- responsive ---------- */
@media (max-width:1080px){
  .layout{grid-template-columns:1fr;gap:34px}
  .col-side{display:grid;grid-template-columns:1fr 1fr;gap:16px}
  .pick-card{grid-row:span 2}
}
@media (max-width:760px){
  .topbar{padding:14px 18px}
  main{padding:24px 18px 30px}
  .brand-sub{display:none}
  .col-side{grid-template-columns:1fr}
  .track{grid-template-columns:24px 44px minmax(0,1fr) auto;gap:10px}
  .cover-wrap{width:44px;height:44px}
  .row-actions{opacity:1;transform:none;gap:4px}
}